Body Mass IndexOrgan SizeBody CompositionObesityBody WeightMuscle, SkeletalMusclesWeight LossMuscle ProteinsWeight GainRisk FactorsSarcopeniaMuscular AtrophyMuscle Fibers, SkeletalOverweightThinnessAnthropometryMyostatinMuscle, SmoothCross-Sectional StudiesMuscle DevelopmentMass SpectrometryMuscle ContractionAdipose TissueProspective StudiesExerciseCohort StudiesMuscle, Smooth, VascularAbsorptiometry, PhotonTime FactorsAge FactorsSex FactorsBody HeightBirth WeightRegression AnalysisSeverity of Illness IndexBody ConstitutionBlood PressureAgingMuscle StrengthWaist CircumferenceBlood GlucoseCase-Control StudiesLinear ModelsFollow-Up StudiesWaist-Hip RatioInsulin ResistanceDietPrevalenceInsulinMuscle Fibers, Fast-TwitchEnergy IntakeMuscle WeaknessMolecular WeightMuscle Fibers, Slow-TwitchObesity, MorbidNutritional StatusMuscle FatigueAdiposityEnergy MetabolismMuscle DenervationLongitudinal StudiesReference ValuesBiological MarkersQuestionnairesHypertensionDiabetes Mellitus, Type 2Skinfold ThicknessQuadriceps MuscleAnalysis of VarianceLogistic ModelsLeptinMotor ActivityMitochondria, MuscleBody Weights and MeasuresBody SizeCardiovascular DiseasesSmokingMultivariate AnalysisPregnancyRetrospective StudiesPredictive Value of TestsSex CharacteristicsTreatment OutcomeUnited StatesLipidsEatingJapanRisk AssessmentOdds RatioTriglyceridesCachexiaEuropean Continental Ancestry GroupNeck MusclesBone DensityIsometric ContractionDiet, ReducingMyocytes, Smooth MusclePhysical FitnessTandem Mass Spectrometry